<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>07_3D-背面是否可见</title>
        <style>


            img {
                width: 350px;
                height: 420px;
                backface-visibility: hidden;
            }

            img:hover {
                transform: rotateY(180deg);
            }
        </style>
    </head>
    <body>
        <div class="outer">
            <img src="./img/b.jpg" alt="">
        </div>
    </body>
</html>